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DE349363C - Tanning process - Google Patents

Tanning process

Info

Publication number
DE349363C
DE349363C DE1917349363D DE349363DD DE349363C DE 349363 C DE349363 C DE 349363C DE 1917349363 D DE1917349363 D DE 1917349363D DE 349363D D DE349363D D DE 349363DD DE 349363 C DE349363 C DE 349363C
Authority
DE
Germany
Prior art keywords
tanning
formic acid
tanning process
water
drummed
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
DE1917349363D
Other languages
German (de)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CHEM FAB VORM WEILER TER MEER
Original Assignee
CHEM FAB VORM WEILER TER MEER
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by CHEM FAB VORM WEILER TER MEER filed Critical CHEM FAB VORM WEILER TER MEER
Application granted granted Critical
Publication of DE349363C publication Critical patent/DE349363C/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C14—SKINS; HIDES; PELTS; LEATHER
    • C14C—CHEMICAL TREATMENT OF HIDES, SKINS OR LEATHER, e.g. TANNING, IMPREGNATING, FINISHING; APPARATUS THEREFOR; COMPOSITIONS FOR TANNING
    • C14C3/00—Tanning; Compositions for tanning
    • C14C3/02—Chemical tanning
    • C14C3/04—Mineral tanning

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Treatment And Processing Of Natural Fur Or Leather (AREA)

Description

Gerbverfahren. In der Patentschrift 334004 ist die Erkenntnis ausgesprochen, daß sich Lösungen des dreiwertigen Eisens dann in hervorragender Weise zum Gerben eignen, wenn sie möglichst wenig kolloidal gelöstes Eisenhydroxyd enthalten. Insbesondere ist dort auch ausgeführt, daß man dieser Bedingung durch Herstellung einer hinreichenden Säurekonzentration in der Gerbbrühe genügen kann. Es wurde nun weiter gefunden, daß man ein Leder von besonders guten Eigenschaften bei kürzerer Gerbdauer erhält, wenn man die Gerbung in ameisensaurer Lösung vornimmt. Auch bei dieser Ausführungsform des Verfahrens kann es sich als zweckdienlich erweisen, gleichzeitig andere gerbende oder die Gerbung befördernde Stoffe, z. B. Formaldiehyd, Formaldehydkondensationsprodukte oder Sulfitzelluloseextrakt zuzusetzen.Tanning process. In the patent specification 334004 the knowledge is expressed, that solutions of trivalent iron can then be used in an excellent way for tanning suitable if they contain as little colloidally dissolved iron hydroxide as possible. In particular is there also stated that one can meet this condition by establishing a sufficient Acid concentration in the tanning liquor can be sufficient. It has now been found that a leather with particularly good properties is obtained with a shorter tanning time, if the tanning is carried out in an acidic solution. Also in this embodiment of the process it may prove expedient, at the same time other tanning or substances promoting tanning, e.g. B. Formaldiehyd, formaldehyde condensation products or to add sulfite cellulose extract.

Beispiele: i. ioo kg gepickelte Blößen werden in einer Gerbbrühe, die auf ioo 1 Wasser 7,5 kg kalziniertes Ferrisulfat, 4 kg ameisensaures Natron und 0,5 kg Ameisensäure enthält, 4. Stunden lang bei --o° gewalkt. Darauf setzt man o, i bis o,2 kg Soda, in Wasser gelöst, während des Laufens der Trommel hinzu und walkt nochmals 4. Stunden.Examples: i. 100 kg of pickled pelts are drummed for 4 hours at -o ° in a tanning liquor containing 7.5 kg of calcined ferric sulfate, 4 kg of sodium formic acid and 0.5 kg of formic acid in 100 liters of water. Then 0.1 to 0.2 kg of soda, dissolved in water, is added while the drum is running and drummed for another 4 hours.

Man verwendet eine Gerbbrühe aus ioo 1 Wasser, 7,5 kg kalziniertem Ferrisulfat, .4 kg ameisensaurem Natron, o,5 kg Ameisensäure, 2 kg Formaldehyd, 3oprozentig, und 41cg Sulfitzelluloseextrakt und verfährt im übrigen wie in Beispiel i angegeben.A tanning liquor made from 100 l of water, 7.5 kg of calcined ferric sulfate, .4 kg of sodium formic acid , 0.5 kg of formic acid, 2 kg of formaldehyde, 3 percent strength, and 41 cg of sulfite cellulose extract is used, and the procedure is otherwise as given in Example i.

Claims (1)

PATENTANSPRUCH: Weitere Ausbildung des Gerbverfahrens nach Patent 334oo4, darin bestehend, daß man die Gerbung mit Salzen des dreiwertigen Eisens in ameisensaurer Lösung mit oder ohne Zusatz anderer gerbender oder die Gerbung befördernder Stoffe aus führt. PATENT CLAIM: Further development of the tanning process according to patent 334oo4, consisting in that the tanning is carried out with salts of trivalent iron in a formic acid solution with or without the addition of other tanning or tanning-promoting substances.
DE1917349363D 1916-02-27 1917-09-30 Tanning process Expired DE349363C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE334004T 1916-02-27
DE349363T 1917-09-30

Publications (1)

Publication Number Publication Date
DE349363C true DE349363C (en) 1922-02-28

Family

ID=60571014

Family Applications (2)

Application Number Title Priority Date Filing Date
DE1916334004D Expired DE334004C (en) 1916-02-27 1916-02-27 Process for tanning using salt solutions of trivalent iron
DE1917349363D Expired DE349363C (en) 1916-02-27 1917-09-30 Tanning process

Family Applications Before (1)

Application Number Title Priority Date Filing Date
DE1916334004D Expired DE334004C (en) 1916-02-27 1916-02-27 Process for tanning using salt solutions of trivalent iron

Country Status (1)

Country Link
DE (2) DE334004C (en)

Also Published As

Publication number Publication date
DE334004C (en) 1921-03-07

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